# List of Catholic dioceses in Great Britain

The Catholic dioceses in Great Britain are organised by two separate hierarchies: the Catholic Church in England and Wales, and the Catholic Church in Scotland. Within Great Britain, the Catholic Church in England and Wales has five provinces, subdivided into 21 dioceses, and the Catholic Church in Scotland has two provinces, subdivided into 8 dioceses. The Catholic dioceses in Northern Ireland are organised together with those in the Republic of Ireland, as the Catholic Church in Ireland was not divided when civil authority in Ireland was partitioned in 1921.
A diocese, also sometimes known popularly as a bishopric, is an administrative unit under the supervision of a bishop. The Diocese of Westminster is considered the mother church of English and Welsh Catholics, and although not formally a primate, the Archbishop of Westminster is usually elected President of the Catholic Bishops' Conference of England and Wales, providing a degree of a formal direction for the other English bishops and archbishops.
From the time of the English Reformation in the 16th century, with Catholicism being declared illegal, there were no Catholic dioceses in England and Wales. From 1688, there came to be appointed several apostolic vicars, clergymen in episcopal orders, governing a territory not in their own name, as diocesan bishops do, but provisionally in the name of the Pope. However, with the passing of the Roman Catholic Relief Act 1829, legalising the practice of the Catholic faith again, Pope Pius IX re-established the Catholic Church diocesan hierarchy on 29 September 1850 by issuing the bull Universalis Ecclesiae. The Hierarchy in Scotland was restored in 1878.
The names of the Catholic dioceses as re-established did not adopt the names of the then existing medieval dioceses, once Catholic and now (in England) Anglican. Four current English Catholic dioceses, those of Leeds, Liverpool, Southwark and Portsmouth, share their territorial name with Anglican dioceses, the Anglican Diocese of Leeds, the Anglican Diocese of Liverpool, the Anglican Diocese of Southwark and the Anglican Diocese of Portsmouth respectively. However, in these cases the dioceses cover differing areas and the Anglican diocese was set up later than the Catholic one.
The Catholic Church in Scotland comprises two Latin ecclesiastical provinces each headed by a Metropolitan archbishop. In addition to the archbishop and his see, each province in turn contains a number of "suffragan" dioceses, each headed by a bishop. In Scotland there are a total of 6 such suffragan dioceses, making overall eight dioceses when the 2 archdioceses are included.
There is an Apostolic Nunciature to Great Britain which is the institutional papal diplomatic representation at full embassy level to the British authorities. The "ambassador", who in fact carries the centuries-old title of "nuncio", has relations with the government of the United Kingdom, and in a different mode with the Catholic bishops of England, Wales and Scotland. He has no dealings with the government of the Irish Republic nor with the Catholic bishops in any part of Ireland. A fellow nuncio, resident in Dublin, is a diplomat accredited to the Irish government and also has dealings with the Irish Catholic bishops both north and south of the border. Other Commonwealth territories are covered by a variety of analogous papal representatives, quite independently of the nuncio in London.

## Current Latin provinces and sees in Great Britain
### Episcopal Conference of England and Wales
#### Ecclesiastical province of Birmingham (founded 1911)

| Diocese | Cathedral | Founded |
| Metropolitan Archdiocese of Birmingham | St Chad's Cathedral | 1850 |
| Diocese of Clifton | Clifton Cathedral | 1850 |
| Diocese of Shrewsbury | Shrewsbury Cathedral | 1850 |
| Diocese |||
| Map of the Ecclesiastical province of Birmingham |||

#### Ecclesiastical province of Cardiff-Menevia (founded 2024)

| Diocese | Cathedral | Founded |
| Metropolitan Archdiocese of Cardiff-Menevia (heir of former Archdiocese of Cardiff founded 1916 (in turn from Diocese of Newport founded 1850), and Diocese of Menevia founded in 1898) | Cardiff Cathedral Swansea Cathedral (former Menevia) | 2024 |
| Diocese of Wrexham | Wrexham Cathedral | 1987 |
| Diocese |||
| Map of the Ecclesiastical province of Cardiff |||

#### Ecclesiastical province of Liverpool (founded 1911)

| Diocese | Cathedral | Founded |
| Metropolitan Archdiocese of Liverpool | Liverpool Metropolitan Cathedral | 1850 |
| Diocese of Hallam | Cathedral Church of St Marie | 1980 |
| Diocese of Hexham and Newcastle | St Mary's Cathedral | 1850 |
| Diocese of Lancaster | Lancaster Cathedral | 1924 |
| Diocese of Leeds | Leeds Cathedral | 1878 |
| Diocese of Middlesbrough | Middlesbrough Cathedral | 1878 |
| Diocese of Salford | Salford Cathedral | 1850 |
| Diocese |||
| Map of the Ecclesiastical province of Liverpool |||

#### Ecclesiastical province of Southwark (founded 1965)

| Diocese | Cathedral | Founded |
| Metropolitan Archdiocese of Southwark | St George's Cathedral | 1851 |
| Diocese of Arundel and Brighton | Arundel Cathedral | 1965 |
| Diocese of Plymouth | Plymouth Cathedral | 1850 |
| Diocese of Portsmouth | Cathedral of St John the Evangelist | 1882 |
| Diocese |||
| Map of the Ecclesiastical province of Southwark. The Channel Islands are not shown; they are part of the Diocese of Portsmouth. |||

#### Ecclesiastical province of Westminster (founded 1850)

| Diocese | Cathedral | Founded |
| Metropolitan Diocese of Westminster | Westminster Cathedral | 1850 |
| Diocese of Brentwood | Brentwood Cathedral | 1917 |
| Diocese of East Anglia | St John the Baptist Cathedral | 1976 |
| Diocese of Northampton | Northampton Cathedral | 1850 |
| Diocese of Nottingham | Nottingham Cathedral | 1850 |
| Diocese |||
| Map of the Ecclesiastical province of Westminster |||

### Episcopal conference of Scotland
#### Ecclesiastical province of Saint Andrews and Edinburgh

* Metropolitan Archdiocese of Saint Andrews and Edinburgh (cathedral St Mary's Metropolitan Cathedral, Edinburgh; established 1878)
** Diocese of Aberdeen (cathedral St Mary's Cathedral, Aberdeen; established 1878)
** Diocese of Argyll and the Isles (cathedral St Columba's Cathedral, Oban; established 1878; originally in the Province of Glasgow)
** Diocese of Dunkeld (cathedral St Andrew's Cathedral, Dundee; established 1878)
** Diocese of Galloway (cathedral St Margaret's Cathedral, Ayr; established 1878; originally in the Province of Glasgow)

#### Ecclesiastical province of Glasgow

* Metropolitan Archdiocese of Glasgow (cathedral St Andrew's Cathedral, Glasgow; established 1878)
** Diocese of Motherwell (cathedral Cathedral of Our Lady of Good Aid, Motherwell; established 1947)
** Diocese of Paisley (cathedral St Mirin's Cathedral, Paisley; established 1947)

## Eastern Catholic and other exempt

* The Bishopric of the Forces in Great Britain (1917) is the Military Ordinariate for all British armed forces, even outside the UK
* The Syro-Malabar Catholic Eparchy of Great Britain (2016)
* The Ukrainian Catholic Eparchy of Holy Family of London (1957)
The Eastern Catholic Churches are autonomous, self-governing particular churches in full communion with the Pope.
* The Personal Ordinariate of Our Lady of Walsingham (2011) is one of three Personal Ordinariates. The ordinariates were established in order to enable "groups of Anglicans" to join the Catholic Church while preserving elements of their liturgical and spiritual patrimony. Personal Ordinariates are headed by Ordinaries.

## Defunct jurisdictions

* Archpriest of England from 1598 to 1621.
* Apostolic Vicariate of England from 1623 to 1688 when it was divided into four districts that lasted until a general redivision in 1840:
   * Apostolic Vicariate of the London District until 1850
   * Apostolic Vicariate of the Western District until 1850
   * Apostolic Vicariate of the Midland District until 1840
   * Apostolic Vicariate of the Northern District until 1850
      * Apostolic Vicariate of the Welsh District created from Western District in 1840 until 1850
      * Apostolic Vicariate of the Central District created from Midland District in 1840 until 1850
      * Apostolic Vicariate of the Eastern District created from Midland District in 1840 until 1850
      * Apostolic Vicariate of the Lancashire District created from the Northern District in 1840 until 1850
      * Apostolic Vicariate of the Yorkshire District created from the Northern District in 1840 until 1850
* Diocese of Beverley, from 1850 to 1878, replaced by the Diocese of Leeds and the Diocese of Middlesbrough.
* Diocese of Newport and Menevia, from 1850 to 1895, replaced by the Diocese of Newport, which became the Archdiocese of Cardiff in 1916, and the Apostolic Vicariate of Wales, which became the Diocese of Menevia in 1898.
* Prefecture Apostolic of Scotland from 1653 to 1694.
* Apostolic Vicariate of Scotland from 1694 to 1727 when it split into two districts that lasted until 1827:
   * Apostolic Vicariate of the Lowland District
   * Apostolic Vicariate of the Highland District
      * Apostolic Vicariate of the Eastern District from 1827 to 1878 when it became the Archdiocese of St Andrews and Edinburgh.
      * Apostolic Vicariate of the Western District from 1827 to 1878 when it became the Archdiocese of Glasgow
      * Apostolic Vicariate of the Northern District from 1827 to 1878 when it became the Diocese of Aberdeen.